Office (OLE) malware analysis — malicious · fc660ee423a47e5b

MALICIOUS

Office (OLE)

154.3 KB Created: 2020-09-14 22:09:00 Authoring application: Microsoft Office Word

MD5: 93681b028274051427726063f1bda838 SHA-1: 88778eb40f2dfd74a652a9f5850bb7315b8463ec SHA-256: fc660ee423a47e5bfab7297baf2765d0d511c0880936244b14b5ef3cb786f10f

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is an OLE document containing VBA macros, specifically a Document_Open macro that is auto-executed. High-severity heuristics indicate the use of CreateObject and p-code execution, suggesting the macro is designed to perform malicious actions. The presence of the 'macros.bas' artifact further confirms the macro content. The script appears to construct a command to download and execute a payload, likely from a remote source, although the exact URL or command could not be fully reconstructed due to truncation and obfuscation.

Heuristics 7

ClamAV: Doc.Malware.Generic-9760527-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Generic-9760527-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `bf2dc6e4793502154f28a14458af4f5198ccc48932a5641a4c34f7f1fcdc0c82`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18582 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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